Furnace



March 1, 1,932.v s. Hol-'MANN EURNAGE Original Filed July 55. 19,29

, l: :l Il. i\ Kum Patented Mar. 1, 1932 vUliql'rlansrArEs GEORGE HOFMANN, OF LYONS, ILLINOIS FURNACE Application filed July 3, 1929, Serial No.

My invention relates' more particularly, though not exclusively, tov oil-red furnaces of theliind comprising a deflector in the coinbustion chamber of the furnace positioned for the discharge thereagainst of the combustion mixture and havingits underside so shaped as to `defiect the combustion mixture laterally, preferably in opposite directions and toward the side walls of the furnace, a

furnace of this .liind being disclosed in my pending application for United States Letters Patent Ser. No. 162,066, filed January 19, 1927. (United. States Letters Patent No. 1,727,598, granted September 10, 1929).

In furnaces of this kind the combustion mixture is caused to travel along. the underside of the deiiector, toward the rear end of the furnace', it being one of my objects to produce such iiow of the combustion mixture gaf-rom the burner discharging at ank angle to thissurface, as for example, and more particularly, upwardly against the latter. y

Referring to the accompanying drawings: Figure 1 is a View in'longitudinal sectional elevation of the lower portion of a furnace embodying my invention.

Figure 2 isa view in elevation taken at the line 2 -2 on Fig. 1 andi viewed in the direction of the arrows.`

Figure Sis av View in longitudinal sectional elevation of the'v'alve-equipped portionvof a pipe of the apparatus of Fig. 1 through which iiuid is suppliedto the furnace.

Figure l is a section taken at the line 4-4 on Fig. 8 and viewed in the direction of the arrowsgand l Figure 5, asection tanken at the line 5-5 on Fig. 1 and viewed in the direction of the arrows.

Referring` to the construction shown, the combustion chamber of a furnace is represented at 5, this chamber containing a'de- Hector 6 which may be, and preferably is, hollow, it being connected at its lower front 5 end witha pipe 7 for connection with a water supply and at its upper rear end with an outlet pipe 8 which, where the furnace is a' hot water or steam boiler, preferably cornmunicates with the water iiues thereof.

The deiector 6 which is ofthe same general 375,821.v Renewed November 10, 1931.

type as that disclosed in my above-referred-to application for patent and substantially of the'specific construction shown in another applica-tion for patent filed by me concurrently herewith, Serial N o; 87 5,822, filed July 3, 1929, is formed of a hollow body portion 9 of general semi-cylindrical form with its upper surface curved, as-shown, the body 9 having a hollow fin, or keel portion, 9a. The iin,

or keel portion, 9*L inclines at its bottom surface upwardly and rearwardly finally merging at the rear end of the member 6l into the plane of the undersurface of the main portion of the body 9 as shown, the upper portion of the forward extremity of the fin, or keel portion, which is represented at 9b and is in direct alinement with the air-inlet hereinafter referred to, being substantially vertical and of substantial knife-edge form as shown, with its side surfaces curving outwardly and rearwardly in opposite directions as represented at 9c. Immediately to the rear of the front portion of the fin justV described, the fin bulges laterally outwardly in opposite direc# tions as represented at 9d, its lower lateral edges from these points rearwardly being practically straight and divergingas represented at 9e.

The shape of the deflector 6 at its underside is thus such that combustion mixture supplied to the front end of the deflect'or and traveling along the lower portion thereof is caused yto be deflected laterally outwardly in oppositedirections from the fin 9a along subn stantiallythe full length of the deiector 6.

In the construction shown the fuel for heating the furnace isV discharged upwardly at vthe front end of the deiiector 6, the structure to this end being providedwith a burner 11 shown as of aconventional oil burning type the oilfor consumption therein being supplied in any suitable way through a pipe 12, and combustion-supporting fluid, as for eX- ample air, supplied through a pipe 13 for mixture with the fuel at the burner 11; the burner being located below the deiiector 6 and, according to the particular construction shown, directly beneath, and in axial alinement vertically with, the forward end of the fin 9, whereby a portion of the upward disis caused to travel lengthwise of the deflector y 6 along the underside of the latter, by directing fluid, as for example combustion-supporting fluid, against the discharge from thel burner 11 and forcing it along the unde-rside of the deflector. To this end the furnace is equippedwith a conduit 14 shown as extending at its rear open end through the front wall of the combustion chamber 5 and disposed substantially in line with the fin 9a.

The fluid suppliedl through the pipe 14 is preferably such as will support combustion, this fluid being preferably air. Likewise the fluid supplied through the pipe 13 is also preferably air, the pipe 13 being shown as Vcommunieating, for its source of supply, with .the pipe 14 which,in the arrangement shown,

would be connected, for its supply, with any suitable air-forcing means. Thus in the operation of the burner air would be supplied throughl both of the pipes 13 and i4, 4the air supplied through the pipe 13 mixing with the fuel, and the air discharging through the pipe 14 forcing the discharge from the burner along the underside of the deflector and aiding in thelcombustion of Athe fuel.

- The pipes 13 and14 are shown as provided with means, represented at 15 and 16, whereby theflow of air therethrough may be separately controlled to adaptthe apparatus for functioning in the most desirable manner depending upon the particular conditions presented- Any suitable means for this purpose may be provided as for example. the meansl 16 shown in Fig. 3 and comprising a disk-partition `17 located inthe pipe 14 and having a spindle 19 ou which a disl'shutter 2O having an operating handle 21 extending through a slot 22 in the pipe 14, is pivote The disk E contains openings 23 grouped about its center, as for example as shown, and the disk 17 contains openings 18 of substantially the same size, number and disposition relative to its axis as in the case of the disk 20. The openings in the disls are spaced apart preferably such a distance from .each other that the dish shutter 2O may be rotated from the position shown in Fig. 3 in which the openings 18 are fully uncovered,

into a position in which these openings arefully covered or are only partially covered and to any desired degree. Thus the amount of air discharging through the pipe 14 may be accurately regulated. The same feature of regulation is also present in the controlling mechanism 15 for pipe 13.

Vilhile I have illustrated and described a particular embodiment of my invention, I do not wish to be understood as intending to limit it thereto, as the same may be variously modified and altered and the invention embodied in other forms of structure without departing from the spirit of my invention. V] hat I claim as new, and desire to secure by `Letters Patent, is:

1. In a furnace, the combination with its combustion chamber, of a deflector therein having an under surface so shaped as to cause combustion mixture` flowing along said surface to be deflected laterally, a burner located adjacent said deflector, a: conduit arranged substantially in line with said deflector for directing fluid against the discharge from said burner and forcing it along said surface, and means for supplying fluid to said conduit.

' 2. Inka furnace, the combination with its Vcombustion chamber, of a deflector therein having an under surface yso shaped as to cause combustion mixture flowing along said surface tobe deflected laterally, a. burner located below said deflector and discharging upwardly against the latter, a conduit arranged substantially in line with said def-lector for directing fluid against the discharge from said burner and forcing it along said surface, and means for supplying fluid to said conduit.

3. In a furnace, the combination with its combustion chamber, ofv a deflector therein having'an under surface so shaped as to cause combustion mixture flowing along said surface to be deflected laterally in opposite directions, a burner located adjacent said deflector, a conduit arranged substantially in line with said deflector for directing fluid against thev discharge from said burner and forcing it along said surface, and means for *supplying Huid to said conduit.

4. In a furnace, the combination with its combustion chamber, of a deflector therein having an under surface so shaped as to cause combustion mixture flowing along said surface toy be deflected laterally in opposite directions, a burner located below said deflector and discharging upwardly against the latter, a conduit arranged substantially in line with Asaid deflector for directing fluid against the discharge from said burner and forcing it along said surface, and means for supplying fluid to said conduit.

5. In a furnace, the combination with its combustion chamber, of a deflector therein having an under surface so shaped as to cause combustion mixture flowing along said surface to be deflected laterally, a burner located adjacent said deflector, means for supplying fluid fuel to said burner, a conduit arranged substantially in line with said delim Hector for directing combustion-supporting fluid against the discharge from said burner and forcing it along said surface, a second conduit communicating with said first-named conduit for supplying combustion-supporting fluid to said burner, means for forcing combustion-supporting fluid through said conduits, and means for varying the proportions of fluid discharging from said conduits.

6. In a furnace, the combination with its combustion chamber, of a deflector therein having an under surface so shaped as to cause combustion mixture flowing along said surface to be deected laterally, a burner located below said deflector and discharging upwardly against the latter, means for supplying fluid fuel to said burner, a conduit arranged substantially in line With said deflector for directing combustion-supporting fluid against the discharge from said burner and forcing it along said surface, a second conduit communicating with said first-named conduit for supplying combustion-supporting fluid to said burner, means for forcing combustion-supporting fluid through said conduits, and means for varying the proportions of fluid discharging from said kconduits.

7. In a furnace, the combination with its combustion chamber, of adeflector therein having an under surface so shaped as to cause combustion mixture flowing along said surface to be deflected laterally, a burner located adjacent said deflector, means for supplying fluid fuel to said burner, a conduit arranged substantially in line with said deflector for directing combustion-supporting fluid against the discharge from said burner and forcing it along said surface, a second conduit communicating with said first-named conduit for supplying combustion-supporting fluid to said burner, means for forcing combustion-supporting fluid through said conduits, and means for separately controlling flow of fluid through said conduits.

8. In a furnace, the combination with its combustion chamber, of a deflector therein having an under surface so shaped as to cause combustion mixture flowing along said surface to be deflected laterally, a burner located below said deflector and discharging upwardly against the latter, means for supplying fluid fuel to said burner, a conduit arranged substantially in line with said deflector for directing combustion-supporting fluid against the dischargefrom said burner and forcing it along saidsurface, a second conduit communicating with said first-named conduit for supplying combustion-supporting fluid to -said burner, means for forcing combustion-supporting fluid through said conduits, and means or separately controlling flow of fluid through said conduits.

GEORGE HOFMANN. 

